Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) expert said, "active low pressure area (LPA) being monitored east of Aparri, Cagayan is now a tropical depression and named Ferdie."

Image From: pagasa.dost.gov.ph

PAGASA weather bulletin posted on their official website, "At 4:00 p.m. today, the center of Tropical Depression "FERDIE" was estimated based on satellite and surface data at 130 km east of Aparri, Cagayan (18.4°N, 123.0°E) with maximum winds of 55 kph near the center. It is forecast to move west northwest at 13 kph. Southwest Monsoon affecting Southern Luzon, Visayas and Mindanao. "